https://www.aaronkemner.com/tags/advanced-unreal-engine/ Recent content in Advanced Unreal Engine on Aaron Kemner Hugo en-us Mon, 17 Aug 2026 13:43:00 +0200 https://www.aaronkemner.com/blog/ue_exploringfoldproperties/ Mon, 17 Aug 2026 13:43:00 +0200 https://www.aaronkemner.com/blog/ue_exploringfoldproperties/ <p>When programming AnimNodes in Unreal Engine, you might encounter an interesting meta-specifier in some <code>UPROPERTY</code>-fields: <code>FoldProperty</code>.</p> <p>Interestingly, while there have been a few (very few) community contributions on this topic, it seems to have never been officially documented. How unexpected.</p> <p>So what does this do, how do we use it, and how does it work?</p> <h1 id="what-is-a-foldproperty">What is a FoldProperty?</h1> <p>Let&rsquo;s get this one out of the way first.</p> <p>The general idea behind this meta-specifier is that we can save on memory if an AnimNode is instantiated <em>a lot</em>. How, you may ask? By removing some of the member variables of the node and treating them as constants. Because if they are constant, we don&rsquo;t need every instance of an AnimNode to hold an instance of that value.</p> https://www.aaronkemner.com/blog/ue_yourfirstanimnode/ Mon, 20 Jul 2026 13:36:49 +0200 https://www.aaronkemner.com/blog/ue_yourfirstanimnode/ <p>Today, we are going to create our very own, very first AnimNode that can be used to modify the pose in the AnimGraph of an Animation Blueprint in Unreal Engine.</p> <p>AnimNodes are a deep topic with a lot of nuances. This blog post will skip over most of that. The goal is to get something working. To introduce the basic concepts of how to create AnimNodes using C++, how to improve their UX beyond basic functionality and what to watch out for.</p>